Crystals of the pyridine solvate of bis(8-hydroxyquinoline)silver(I), Ag(C9H9NO)C9H6NOHO•C5H5N, are monoclinic, space group P21/a, with cell dimensions a = 10.87 ± 0.01 Å, b = 10.65 ± 0.01 Å, c = 16.70 ± 0.01 Å, β = 92.6 ± 0.2°, Z = 4. Atomic parameters have been determined from a three-dimensional analysis using 2163 independent intensities to which no absorption corrections were applied. Refinement was by observed and calculated differential syntheses using isotropic temperature factors. The final discrepancy index is R = 0.116.The coordination of the silver atom is distorted tetrahedral, with bonds to the phenolic oxygen and ring nitrogen atoms of both 8-hydroxyquinoline molecules. Adjacent bis(8-hydroxyquinoline)silver molecules are linked by a hydrogen bond between two oxygen atoms. The pyridine molecules are held in the lattice by van der Waals' forces.